Reversible dipper-tooth.



W. s. MoKBE. REVERSIBLE DIPPER TOOTH. APPLICATION FILED 001227 1911.

1,088,916 Patented Mar. 3, 1914.

In ven tor.- bdi a mu,

- tty UNITED STATES PATENT OFFICE.

WALTER S. MOKEE, OF GLENCOE, ILLINOIS, ASSIGNOR TO EDGAR ALLEN AMERICAN MANGANESE STEEL COMPANY, OF AUGUSTA, MAINE, A CORPORATION OF MAINE.

REVERSIBLE DIPPER-TOOTH.

Specification of Letters Iatent.

Patented Mar. 3, 1914.

To all whom it may concern Be it known that I, \VAL'rnn S. McKee, a citizen of the United States, and a resident of Glencoe, in the county of Cook and State of Illinois, have made and invented certain new and useful Improvementsin Reversible Dipper-Teeth, of which the following is a specification.

My invention relates to teeth for the dippers of excavating, digging, dredging and similar machines; and the object thereof is to provide certain improvements in and relating to detachable and reversible teeth for such dippers, and in the shank which is secured to the dipper body and to the outer or free end of which the tooth is secured.

With the above and other objects of invention in vienv, my invention consists in the improved detachable and reversible dipper tooth and supporting shank therefor hereinafter described and claimed, and illustrated in the accompanying drawing wherein the preferred embodiment of my invention is shown. a

In the drawing: Figure 1 is a view showing my improved dipper tooth secured in position upon the free'end of a supporting shank, the view showing a side elevation; Fig. 2 is a view showing the same in plan; Fig. 3 is a view showing a side elevation of the tooth detached from the shank; Fig. 4 is a view showing a side elevation of the free end of the shank; Fig. 5 is a view showing the .tooth in plan; and, Fig. 6 is a view showing the end of the shank in plan.

Referring to the drawing, 7 designates a supporting shank designed to be secured to the front of the dipper of a digging or excavating machine and to the free outer end of which is secured my improved tooth designated as a whole by the reference numeral 8.

The tooth 8 is bifurcated to thereby provide two arms identical in form with one another and the end of the shank is provided with similar oppositely arranged seats 10 upon which the arms rest when the tooth is secured in place, from which it will be understood that the detachable tooth may be secured in place in either of two positions, and that after the tooth has been used, for a time and partially worn out it may'be removed and secured to the shank in a reversed position, thereby enabling substantially the entire tooth to be worn away in use and reducing the amount of wasted or scrap material to a minimum.

The arms 9 are connected with one another by means of a centrally located web 11 which lies within a slot 12 formed in the end of the shank when the tooth is secured thereto, the web strengthening the point and preventing the sides or arms 9 from spreading and also preventing the point from moving sidewise upon the end of the shank because of its position within the slot 12.

The arms 9 are provided with lugs 13 upon their inner surfaces and which lugs are narrower than the ends of the arms and project toward one another, and the seats 10 are provided wit-h recesses 14 in which said lugs lie when the tooth is secured to the shank, said lugs serving to prevent transverse movement of the extremities of the arms; and the fact that they are narrower than the arms and located upon the inner surfaces thereof secures a construction in which dirt is prevented from entering the joint between the lugs and the recesses by the overlying side portions 19 of the ends 8 of the arms. Furthermore, the recesses being beneath the ends of the tooth are not worn away and their depth thereby reduced by the wearing away of the shank at the rear of the tooth as would be the case if the recesses were formed in the upper and lower surfaces of the shank and back of the ends of the arms of the tooth. The detachable and reversible tooth is secured in place by a bolt 15 which extends through a hole 16 at the end of the shank, recesses 17 being provided in the arms 9 within which the' head and nut of the bolt lie as shown.

The rear ends of the arms 9 and lugs 13 lie preferably in a single transverse plane as shown in Fig. 3, and said ends abut against shoulders 18 which extend across or transverse to the supporting shank 7, which shoulders receive the thrust due to digging when the tooth is in use.

Having thus described and explained my invention, I claim and desire to secure by Letters Patent 1. A detachable and reversible tooth adapted to be secured to the free end of a supporting shank, said tooth being bifurcated to provide two arms of like form and having a centrally located web connecting said arms with one another. said arms having each a centrally located projecting lug at its free end which lugs are narrower than and extend beyond the inner surfaces of said arms and toward one another, the extremities of said arms and of said lugs lying in a single transverse plane and each arm having also a hole intersecting the lug upon it, said holes being in line with one another so that a securing member may extend through both holes.

2. In combination a detachable and reversible tooth for excavating dippers, the same being bifurcated to provide two arms of like form and having a centrally located web connecting said arms with one another, said arms having each a centrally located projecting lug at its free end, which lugs are narrower than and extend beyond the inner surfaces of said arms and toward one another, the extremities of said arms and of said lugs lying in a single transverse plane;

a supporting shank the free end of which is shaped to receive said tooth and to which the same is secured, the extremity of said shank being slotted to receive the web aforesaid, and provided with two oppositely located transverse shoulders against which the extremities of said arms abut, and with two centrally located recesses within which said lugs lie; and a securing member extending through said arms and shank and through the lugs and recesses aforesaid for holding said tooth in place.

Signed at Chicago in the county of Cook and State of Illinois this 19th day of October A. D. 1911-.

WALTER S. MCKEE.

Witnesses BENJ. F. CLARK, Jr., EUGENE C. BAUER. 

